26650 Batteries | High-Performance Lithium-Ion Power Solutions

A 26650 battery is a high-capacity, rechargeable lithium-ion (Li-ion) cell known for its larger size and increased power output. With standard dimensions of 26mm in diameter and 65mm in length, these batteries offer higher energy storage, extended runtime, and superior discharge rates, making them ideal for flashlights, power tools, vaping devices, electric vehicles, and battery packs.

Key Features & Specifications

• Voltage: Typically 3.6V or 3.7V nominal, with a full charge voltage of 4.2V and a discharge cutoff around 2.5V – 3.0V.
• Capacity: Ranges from 4000mAh to 6000mAh, depending on the chemistry and manufacturer.
• Battery Chemistry Options:
  • Lithium Cobalt Oxide (LiCoO₂ - LCO): High energy density for long-lasting performance.
  • Lithium Manganese Oxide (LiMn₂O₄ - LMO): Improved safety and thermal stability.
  • Lithium Nickel Manganese Cobalt Oxide (LiNiMnCoO₂ - NMC): A balance of energy density, power output, and longevity.
  • Lithium Iron Phosphate (LiFePO₄ - LFP): Extremely safe and long-lasting but operates at 3.2V nominal instead of 3.7V.

Protected vs. Unprotected 26650 Batteries

• Protected 26650 Batteries: Feature an internal protection circuit to prevent overcharging, over-discharging, and short circuits, making them slightly longer than unprotected versions.
• Unprotected 26650 Batteries: Used in high-drain applications where an external Battery Management System (BMS) handles protection.

Common Applications for 26650 Batteries

✔ High-Powered Flashlights & LED Devices – Ideal for long-runtime, high-lumen flashlights and tactical lighting.
✔ Cordless Power Tools – Found in heavy-duty drills, saws, and industrial-grade equipment.
✔ Vaping & High-Drain Devices – Designed for high-wattage vape mods requiring consistent power output.
✔ Electric Vehicles & E-Bike Battery Packs – Used in high-performance energy storage for extended travel distances.
✔ Solar Energy Storage & Backup Power – Integrated into off-grid solar banks and UPS systems.

Choosing the Right 26650 Battery

📌 Voltage Compatibility: Ensure your device supports 3.6V or 3.7V, as some applications may require LiFePO₄ (3.2V) cells.
📌 Protected vs. Unprotected: If your device lacks built-in safety features, choose a protected cell.
📌 Flat Top vs. Button Top: Some devices require button tops for proper contact, while others use flat tops.

At 18650Battery.com, we offer a curated selection of premium 26650 batteries from trusted manufacturers, ensuring safe, reliable, and long-lasting performance. Browse our inventory today to find the right battery for your needs!